Ignition switch wires

Gotta love that wiring . . .
gionetz

Re: Ignition switch wires

Postby gionetz » Mon May 06, 2013 10:33 am

Here is a 75' diagram that had colors in Italian that I re-wrote in English...(for whatever it's worth)...and, of course, this doesn't have the green/black and grey wires! :( Image

fergarelli
Posts: 31
Joined: Fri Jun 08, 2012 4:43 pm
Your car is a: 1976 124 Spider

Re: Ignition switch wires

Postby fergarelli » Tue May 07, 2013 3:53 pm

This is AWESOME! Thanks so much.

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westy64
Posts: 343
Joined: Tue Jul 10, 2012 2:10 am
Your car is a: 1976 spider fiat 124 US
Location: Basque Coast, France

Re: Ignition switch wires

Postby westy64 » Sun May 26, 2013 3:32 pm

I confirm that green/black and grey go to terminal 16 at the back of ignition switch.
Terminal 16 is hot at the same time as terminal 50 which goes to the starter.
1976 Fiat 124 Spider (AKA Prunette)
1971 VW 181 (Thing)

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giuliot60
Posts: 715
Joined: Fri Mar 30, 2012 9:39 pm
Your car is a: 81 Fiat Turbo removed Spider
Location: Concord, NC (Charlotte area)

Re: Ignition switch wires

Postby giuliot60 » Mon May 27, 2013 12:36 am

This link may be helpful too. I used it to rebuild my switch, but it provides good info on how the wiring works and is set up.

http://www.mirafiori.com/faq/content/switch/index.html
Giulio/Charlotte
1st car '75 pistachio 128 sedan
Owned a '74 Spider, '68 Firebird, a '65 GTO convertible, and a customized '74 650 Yamaha
Currently own an '81 Turbo (removed) Spider

grasshopper
Posts: 205
Joined: Wed Aug 13, 2014 10:25 pm
Your car is a: 1976 Fiat Spider

Re: Ignition switch wires

Postby grasshopper » Wed May 10, 2017 10:32 pm

I have a similar set up (new car to me and I'm trying to figure things out),,,but I have a black wire that is disconnected and no other available terminals,,,however,my green black and grey wire which plugs into switch also has a yellow wire spliced with the black n grey wires and the yellow splice also plugs into back of switch,,,,,what do I do?

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giuliot60
Posts: 715
Joined: Fri Mar 30, 2012 9:39 pm
Your car is a: 81 Fiat Turbo removed Spider
Location: Concord, NC (Charlotte area)

Re: Ignition switch wires

Postby giuliot60 » Wed May 10, 2017 10:44 pm

Do you have a wiring schematic? They are available online, here, at FiatSpider on Facebook, and mirafiori.com.

GT
Giulio/Charlotte
1st car '75 pistachio 128 sedan
Owned a '74 Spider, '68 Firebird, a '65 GTO convertible, and a customized '74 650 Yamaha
Currently own an '81 Turbo (removed) Spider

grasshopper
Posts: 205
Joined: Wed Aug 13, 2014 10:25 pm
Your car is a: 1976 Fiat Spider

Re: Ignition switch wires

Postby grasshopper » Thu May 11, 2017 5:19 pm

I have a few schematics. My set up does not make sense though. This is a new car to me so I am presently trying to get it running. My ignition switch does not have the black wire connected. I think the black wire is for the alternator is it not ? I'm sure this black wire has to be connected,although there is not another post available to connect it. Also,as I mentioned before, I have a green/black and grey wire connected together But it has a yellow wire spliced into it with its own connector. Both the green/black and grey and the yellow wire are connected to the switch. I tested it out with the ignition on the "on" position and it seems to control the fuel pump in the trunk. The weird part though is when I disconnect the yellow wire that is spliced to the green/black/grey there seems to be a weird hissing sound coming from the engine bay ,,I think it may be the fuel regulator ?? Any help would be greatly appreciated :( :(

spider2081
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Your car is a: 1981 Spider 2000
Location: Wallingford,CT
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Re: Ignition switch wires

Postby spider2081 » Thu May 11, 2017 9:03 pm

My ignition switch does not have the black wire connected.


The black wire and the brown wire are "hot all the time" wires that bring battery voltage to the ignition switch. They should have battery voltage on them as long as the battery is properly connected. On the Sepia brand switch they go on terminals 30 (brown) and 30/1 (black)

grasshopper
Posts: 205
Joined: Wed Aug 13, 2014 10:25 pm
Your car is a: 1976 Fiat Spider

Re: Ignition switch wires

Postby grasshopper » Sun May 14, 2017 3:26 pm

I am slowly making progress on my Spider. The ignition switch is a mystery to me as I am trying to figure out all the wiring on it. When the switch is in the "on" position,my fuel pump is making a clicking or pumping sound (from trunk) but there is also a light buzzing sound coming from the engine compartment,,i think its coming from what looks like a square relay that sits beside other relays,,,is this buzzing normal or is there something wrong ? Also, I noticed that when I connected the black wire to the ignition switch,all lights on dash light up even on the off position until I disconnect the battery. What is going on ?

grasshopper
Posts: 205
Joined: Wed Aug 13, 2014 10:25 pm
Your car is a: 1976 Fiat Spider

Re: Ignition switch wires

Postby grasshopper » Fri Jun 09, 2017 6:33 pm

My electronic fuel pump is not shutting off unless I disconnect the battery. Is it ok to connect the pink wire at the ignition switch with the wires for the fuel pump into the same connection. This seems to be my only solution.


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